1. Department of Pediatrics, Faculty of Medicine, McGill University, Montreal, Quebec, Canada; and Montreal Children's Hospital, McGill University Health Center, 2300 Tupper Street, Montreal, Quebec, Canada H3H 1P3;
2. Louis Dundas Centre for Children's Palliative Care, University College London Institute of Child Health, London, United Kingdom;
3. Louis Dundas Centre for Children's Palliative Care, University College London Institute of Child Health, London, United Kingdom; and Rutgers University, Camden, New Jersey, USA